Door latch mechanism



G. J. JANoNls DOOR LATCH MECHANISM Filed Feb. 4. 1929 i EN.

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ATTORNEYS Dec. 1, v1931.

Patented Dec. 1, 1931 UNITED 'STATES t GEORGE ianivoms, or DEARBQRN,-MICHGAN DOOR mass rder-NIST@ Application ned February 4; 1929.1 SerinNo, 3373421.V

` This invention relates vgenerally to latch mechanism for vehicle doorsand the like, and consists of certain novel features of construction,combinationsv and arrangements "of parts that will be hereinafter morefullydescribed and particularly pointed ,out 1n the appended claims. f

1n the accompanying drawings:`

Figure 1 is a fragmentary perspective view of a door lock board with alatch Amechanism embodying my invention applied thereto and showing'byfull and dotted lines respectively the operative and inoperativeppsitlons for the clogging means for the'outside bolt retracting means;

Figure 2 is a taken on the line 2--2 of Figure 1;

Figure 3 is a ,vertical sectional view taken on the line SH3 of Figurel;

Figure 4 is a detail perspective view of the outside'bolt retractingmember and handle;

Figure 5 is a detail perspective view of vthe latch bolt and ShanksReferring nowr to the drawings, 1 is a latch case plate secured to theinner side of a lock board 1 upon the inner side of a vehicle door andhaving a lateral flange 2 at its forward edge attachable to the freeedge ofthe door. 8 is a reciprocating latch bolt that is movablethroughan `opening in the flange 2 for engagementY with a suitablekeeperf (not shown) and having an integral shank4constituting a rearwardextension and slidable upon the case plate 1. 5 is a relatively'long rodthreadedlyconnected to the shank 4 and projecting rearwardly therefromin substantially parallel relation to the case plate 1. 6 is alateral-Hange struck out from the-case plate i intermedia te of its endsand having an opening 7 receivingthe rod 5, and 8 is a coil springsleeved upon the rod 5 between the lateral flange 6 and the rear end ofthe shank 4 and normally holding the latch ybolt in projected position.a e" Y With the present construction the latch bolt 3 may be retractedfrom the'inner side of the door by a handle 9 having a shaft 10 that isj ournaled in an escutcheon plate ll'and auxiliary plate 12 upon theinner side of the door and that has a crank 13 at its inner enddishorizontal sectional view posed 'upon the inner sideofthe plate 12and rterminallyconnected by a' linkvl4'to the rear `end of the rod f5,Preferablylthe adjacent end `portions 15 and l'respective'ly-of vvthe*crank and rod are` T-shape informand are received inthe -link 14 atoppositeendstherelV ofV Thus rotation of the handle 9 inanaliticlockwise direction willcause the link14and rod 5 to retract thelatch boltagainst the tension of the .spring 8.` Inlthis'connection itwill be'noted that the handle 9 is longitudinally` curved and issubstantially parallel to the inner side of the door, hence may also beused as a pull-to handle when itis desired to close or open the door. jj j Y i i y vPreferably the means operable on thel outer' 'sideof thedoor forretracting` the'latch bolt i comprises an Voperating handlef' ofloop' formation having a substantially straight reciprocating'shank 21slidable in a rose or escutcheon`22 uponthe' outer side of the door andprovided at `its inner end with atrian gular portion 23.l that isreceived in an elon gated::longitudinallyA extendingl slot 24ir in thebolt shank 4. As'shown, the'inclined edge i 25 lof this triangularportion is at the" rear thereof and engages the rear-end of the slot 24'and is'adapted when the handle 20 and shank 21 are-pulled laterallyoutwardly in a direction atright angles' withrespect to theldoortofcamf'the latch shank 4 IGlI'Waldly and thereby Vcause the bolt Sto beretracted against the tension of the spring' 8, VThe straight edge 26 ofthe triangular portion is at the.y front thereof 'and is normally spacedrearwardly with 'respect to the forward 'end 27 of the slot Thus'vwiththelat'ch mechanism described, the bolt Smay befretracted from theinside of the door b y manipulation of the inside handle 9without movingtheoutside bolt retracting: y y

means. lLikewise dueto the link -14 connection betweenthe rod'and crank13,\the boltv 3 'may be retracted-from the outside "of the i door bymanipulation ofthe loop handle 20 Withoutfmoving the inside lboltretracting means;L As" afresult, ythe bolt 3 Vmay beofperated fromopposite sides of the door by in-V dependently operable means.`

Preferably a block is secured to the rear i face of the lateral flange2in parallel relation to the bolt shank 4 and constitutes an abutment orstop for a shoulder 31 upon the vforward straight edge 2 6 of thetriangular portion of the shank 21 `and also serves asaVV guide for saidstraight edge 26 when the triangular portion and shank are reciprocatedinwardlyand outwardly by the handle 20. It will'ialso be noted that thehub 40 of the outside handle 20 is provided at its inner end Vupon'diametrically opposite sides thereof with triangular or wedge shapeprojections 40 which .normally engage similar recessesV 41 inthe forwardrend of the rose'or escutch-Y eon hub 22 and thereby normally maintainthe outside handle ink proper operative poy of the latch bolt .3 by any.unauthorized person. As shown thisisL-accomplished by the provisionofalever 50 that is pivoted inten mediateof its endsupon apin 51 projectinglaterally from the case plate 1 and that has .annend portion 52 that isslidableover the lcase plate into aV rearwardly openingslotv 53 in thetriangular portion 23 of the outside handle shankand thereby preventstheV inclined edge 25 of said triangular portion from moving outwardlyand functioning as a cam tov movethev latch bolt shank rearwardly. Normallythe lever 50 isinan inclined inoperative or neutral position asillustrated in dotted lines,.lligure 1 but may be easily and quicklymoved intooperative clogging position as illustrated-in solid lines,Figure 1, by manipulation of the lever aboutv its pivot. InVthisconnection it will. be noted that the uppery end of this leverconstitutes a handle portion always accessible from the inner sideVofthe door.. I C z l Thus, Vfromthe foregoing descriptionit willbeapparent that I haveprovided an extremely simple latchn means andclogging means fortlie outside bolt retracting means that can beVmanufactured at comparatively lowcost andthat can be readily installed uon the doors of motor vehicles andthe like.

oreover, it will be noted that the coil spring 8 not only holds the bolt3in projected lposition, but due to the engagement of the rear end ofthe slot 24 in the bolt shank 4 with the .rear inclined edge 25 ofthetriangularv portion l.23j of the outside handle shank 21, the

lsaid shank and'handle20 are normally held by the spring 8 in operativebolt retracting y of the invention will be readily apparent, desire tohave itunderstood that I do not limit myself to what is herein shown.and described and that such changes may be resorted towhen desired asfall within the scope of what is claimed. v

l What I claim as my inventionis:V y y 1.1In a door latch mechanism, acase plate attachable to the inner side of a door, a latch bolt having ashank slidable over vsaid case plate, and means operable from the outerside of a door for actuating said bolt including a longitudinallymovable member having a cam portion .between thebolt and case plateengageabl'e with the former and limited inV its inward longitudinalmovement by thelatter. v

2. In a door latch mechanism, a latch bolt having a reciprocating shank,a reciprocating member movable in avplanie at substantially rightanglesto theshank to move the bolt,

and a support for the bolt including a caseV plate constitutinga'bearingfor the sli ank and an abutment for the reciprocating member.,

3. In a door latch mechanism, a case plate attachable to the inner sideof av door, a latch bolt having avshank movable over one side of thecase plate, actuating means for the bolt including a reciprocatingmember hav,- ing a cam portion between the case plate and bolt andengageable with thelatter, and dogging means for the member including-alever movable between the case plate'and'shank into engagement fwiththecam.A

4. In a door latch mechanism, a latch bolt -having a sliding shank, andactuatingy means for said bolt including a reciprocatingrod movable in aplane substantialy aty right-angles to said'bolt and 4provided at oneend for said bolt including a reciprocating rod l movable ina planesubstantially at right angles to the bolt and-terminating in a camithatis engageable with the bolt and ythat has a slot for receiving asuitable dogging mem;

ber. u Y InA testimony whereof I aiiX my signature. L J. JANONIS.

position] kThus with this construction only *y one spring is requiredvandthe usual outside handle'spring assembly has'been dispensed f withentirely.

While it is believedr that from the Aforegoingjdescription the nat-ureand advantages

